System Tables Views Oracle PLSQL

SQL>
SQL>
SQL> create or replace type numberlist_t
  2  as varray(4) of varchar2(20);
  3  /
Type created.
SQL>
SQL> describe numberlist_t
 numberlist_t VARRAY(4) OF VARCHAR2(20)
SQL>
SQL> select type_name, typecode
  2  from   user_types;
Enter...
OBJECTELEM                     OBJECT
SQLMONTH_TABLETYPE             COLLECTION
ORD_TYPE                       OBJECT
ORD_TABLE                      COLLECTION
ADDRESS_TYP                    OBJECT
VARRAY_PHONE_TYP               COLLECTION
NESTED_TABLE_ADDRESS_TYP       COLLECTION
VARRAY_ADDRESS_TYP             COLLECTION
VCARRAY                        COLLECTION
CUSTOMER_TY                    OBJECT
MYSCALARTYPE                   OBJECT
PERSON_TYPE                    OBJECT
NUMBERLIST_T                   COLLECTION
ADDRESS_TYPE                   OBJECT
DATE_LIST                      COLLECTION
STOLEN_ITEMS                   OBJECT
STATS_LINE                     OBJECT
STATS_ARRAY                    COLLECTION
RUN_STATS_OUTPUT               OBJECT
REC_LIST                       COLLECTION
REC                            OBJECT
Enter... drop type numberlist_t force;
EMP2REC                        OBJECT
EMP2LIST                       COLLECTION
NUM_LIST                       COLLECTION
ADDRESS_RECORD                 OBJECT
INDIVIDUAL_RECORD              OBJECT
INTEGER_VARRAY                 COLLECTION
INDIVIDUAL_ADDRESS_RECORD      OBJECT
VARRAY_NESTED_TABLE            COLLECTION
T1                             OBJECT
T2                             OBJECT
ORACLEERROR                    OBJECT
DISCOUNT_PRICE_OBJ             OBJECT
BOOK_OBJ                       OBJECT
MUSIC_PERSON_OBJ               OBJECT
MUSIC_OBJ                      OBJECT
CD_OBJ                         OBJECT
INVENTORY_OBJ                  OBJECT
ADDRESS_OBJ                    OBJECT
PERSON_OBJ                     OBJECT
CONTACT_OBJ                    OBJECT
PUBLISHER_OBJ                  OBJECT
Enter...
ABBREV_INVENTORY_OBJ           OBJECT
ABBREV_BOOK_OBJ                OBJECT
VARRAY_LOB_OBJ                 COLLECTION
VARRAY_LOB2_OBJ                COLLECTION
VARRAY_TABLE_OBJ               COLLECTION
VARCHAR2_TYPE                  COLLECTION
BUILD_TEST                     OBJECT
NAME_OBJECT                    OBJECT
CONTACT_OBJECT                 OBJECT
PERSON_TABLE                   COLLECTION
PERSONS                        COLLECTION
PERSON_TABLE_T                 COLLECTION
FILM_T                         OBJECT
EMPLOYEE_T                     OBJECT
STUDENT_T                      OBJECT
BOOK_TYPE                      OBJECT
FILM_TABLE_T                   COLLECTION
DIRECTOR_T                     OBJECT
STAFF_T                        OBJECT
MANAGER_T                      OBJECT
WORKER_T                       OBJECT
Enter...
CUSTOMER_T                     OBJECT
LIST                           COLLECTION
CUSTOMERTYPE                   OBJECT
DATETABLETYPE                  COLLECTION
GIFT_TYPE                      OBJECT
UNITTYPE                       COLLECTION
CARD_UNIT_VARRAY               COLLECTION
CARD_SUIT_VARRAY               COLLECTION
CARD_DECK_TABLE                COLLECTION
EMPTYPE                        OBJECT
CATEGORYTYPE                   COLLECTION
GIFT_TABLE                     COLLECTION
CHARARRAYTYPE                  COLLECTION
76 rows selected.